CN210367050U - Concentration and evaporation device for zero discharge of power plant wastewater - Google Patents
Concentration and evaporation device for zero discharge of power plant wastewater Download PDFInfo
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- CN210367050U CN210367050U CN201920976766.1U CN201920976766U CN210367050U CN 210367050 U CN210367050 U CN 210367050U CN 201920976766 U CN201920976766 U CN 201920976766U CN 210367050 U CN210367050 U CN 210367050U
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Abstract
A concentration and evaporation device for zero discharge of power plant wastewater relates to the technical field of power plant wastewater treatment. The device of the utility model comprises a concentration tower system and a rotary atomization evaporation system. A spray layer and a demister are arranged above the interior of the concentration tower system. One part of the flue gas enters the inlet of the flue, and the other part of the flue gas is mixed with the outlet flue gas at the top end of the concentration tower and sent to the original desulfurization system. The power plant wastewater at the bottom in the concentration tower is connected to the spraying layer through a leading-out pipeline, and the other part of the concentrated wastewater is sent into an evaporation tower of the rotary atomization evaporation system. One part of flue gas from the denitration system is sent to the top of the evaporation tower, and the other part of flue gas is sent to the dust remover. The atomized wastewater at the bottom of the evaporation tower enters a dust remover, and the outlet of the dust remover is respectively connected to the original desulfurization system and the concentration tower system. The utility model discloses a carry out concentration and atomizing with desulfurization waste water and make the evaporation of water, the dissolved salt particulate matter of production is absorbed by the dust remover and is realized the waste water zero release, can effectively improve the environmental protection operation level of power plant, reduce boiler operation harm, reduce energy consumption.
Description
Technical Field
The utility model relates to a power plant's waste water treatment technical field, especially the concentration evaporation technique of power plant's desulfurization waste water zero release.
Background
Thermal power generation is a main contributor to electric power, and sulfur dioxide (SO) is the main fuel of thermal power generation, namely, the atmospheric pollutant generated after coal combustion2) Nitrogen oxides, smoke (inhalable particles) and carbon dioxide as a greenhouse gas.
SO in China due to coal-fired flue gas emission2NOx pollution has been very severe. In recent years, with the gradual increase of environmental protection requirements, in order to reduce SO in flue gas of power plants2The emission of the flue gas desulfurization device and the denitration device are added in boilers and other equipment (such as cement kilns, sintering machines and the like) in various industries (such as electric power, chemical industry, steel, cement, waste incineration and the like), and the desulfurization and denitration devices in partial areas are transformed into ultra-low emission.
The waste water discharged by wet desulphurization is weakly acidic, contains high contents of solid particles and dissolved salts, also contains pollutants such as heavy metal, COD and the like, and belongs to one of the most difficult-to-treat tail end waste water of thermal power plants. At present, the desulfurization wastewater is mainly treated by a chemical precipitation method, and the discharge meets the quality control index of limestone-gypsum wet desulfurization wastewater of thermal power plants (DLT 997) through a series of treatment processes of oil removal, neutralization, flocculation, precipitation, slurry dehydration and the like. However, with the deterioration of the quality of the desulfurization process water, the desulfurization waste water system used at present is difficult to reach the standard. Meanwhile, the method for treating the wastewater is difficult to remove the enriched chloride ions in the wastewater, and the chloride ions have strong corrosivity, so that the chloride ions are difficult to recycle.
At present, the desulfurization wastewater in most power plants is mainly used for dry ash humidifying or ash field spraying, coal field spraying, wet slag flushing, discharging and the like in an ash field. However, these treatment methods have certain risks, for example, chloride ions in the desulfurization wastewater sprayed in a coal yard are not reduced in a thermodynamic system and gradually accumulated in a desulfurization tower, and sodium salts in the desulfurization wastewater are easy to coke in a furnace under a high-temperature condition; the waste water after slag flushing needs secondary treatment, and the zero discharge of the waste water is difficult to realize really.
The operation cost is too high by directly adopting a membrane concentration process; the direct thermal evaporation process for waste water is available at home and abroad, and the energy consumption is huge.
Disclosure of Invention
In order to solve the defects existing in the prior art, the utility model aims to provide a concentration and evaporation device for zero discharge of power plant wastewater. It makes the moisture evaporation through concentrating and atomizing desulfurization waste water, and the dissolved salt particulate matter that produces is absorbed by the dust remover and is realized the waste water zero release, can effectively improve the environmental protection operation level of power plant, reduce boiler operation harm, reduce energy consumption.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a concentration and evaporation device for zero discharge of waste water of a power plant is structurally characterized by comprising a concentration tower system and a rotary atomization and evaporation system. The concentration tower system comprises a concentration tower, and a spraying layer and a demister are arranged above a flue inlet in the concentration tower. The part of the flue gas from the rotary atomization evaporation system dust remover passes through a boiler induced draft fan, and then sequentially passes through a concentrating system inlet baffle and a concentrating system induced draft fan to enter a flue inlet on the side wall of the concentrating tower. The bottom is power plant's waste water in the concentrated tower, and concentrated circulating pump connection to of bottom of the concentrated tower sprays the layer, and the export flue gas on concentrated tower top mixes with another part flue gas that comes from the boiler draught fan behind the concentrated system outlet baffle and sends to former desulfurization system. Concentrated waste water led out from the bottom of the concentration tower is conveyed to a rotary atomization evaporation system by a concentrated waste water conveying pump. The rotary atomization evaporation system comprises an evaporation tower, and concentrated wastewater from the concentration tower system enters the evaporation tower through an atomizer at the top of the evaporation tower. One part of flue gas from the denitration system is sent to the top of the evaporation tower through an inlet baffle of the evaporation system, and the other part of flue gas is sent to the dust remover through a tail flue of the boiler. The atomized wastewater at the bottom of the evaporation tower enters the dust remover through an outlet baffle of the evaporation system, and the outlet of the dust remover is connected to the original desulfurization system and the concentration tower system through a boiler induced draft fan respectively.
The utility model discloses owing to adopted above-mentioned structure, it has following advantage and profitable effect to compare with prior art:
1) chloride ions can be removed from the desulfurization system, and coking in the desulfurization tower is avoided.
2) The desulfurization waste water is atomized in the rotary atomization evaporation system, so that zero discharge of waste water is realized, and the environmental protection level of a power plant is improved.
3) The evaporation heat energy comes from the hot flue gas of the desulfurization system, and the cyclic utilization of the heat energy is realized.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
FIG. 1 is a schematic view of a concentrating tower system of the present invention;
fig. 2 is a schematic view of the rotary atomization evaporation system of the present invention.
Detailed Description
Referring to fig. 1 and 2, the utility model discloses a concentrated evaporation plant for power plant's waste water zero release includes concentration tower system and rotatory atomizing vaporization system. The concentration tower system comprises a concentration tower 4, and a spraying layer 5 and a demister 6 are arranged above a flue inlet in the concentration tower 4. The part of the flue gas from the rotary atomization evaporation system dust remover 15 after passing through the boiler induced draft fan 1 sequentially enters the flue inlet on the side wall of the concentration tower 4 through the concentration system inlet baffle 2 and the concentration system induced draft fan 3. The bottom in the concentration tower 4 is power plant wastewater, and a leading-out pipeline at the bottom of the concentration tower 4 is connected to the spraying layer 5 through a concentration circulating pump 8. The outlet flue gas at the top end of the concentration tower 4 is mixed with the other part of flue gas from the boiler induced draft fan 1 after passing through an outlet baffle 7 of the concentration system and is sent to the original desulfurization system, and the concentrated wastewater led out from the bottom of the concentration tower 4 is sent to the rotary atomization evaporation system through a concentrated wastewater delivery pump 9. The rotary atomization evaporation system comprises an evaporation tower 13, and concentrated waste water from the concentration tower system enters the evaporation tower 13 through an atomizer 12 at the top of the evaporation tower 13. One part of flue gas from the denitration system is sent to the top of the evaporation tower 13 through the inlet baffle 11 of the evaporation system, and the other part of flue gas is sent to the dust remover 15 through the tail flue 16 of the boiler. The atomized wastewater at the bottom of the evaporation tower 13 enters a dust remover 15 through an evaporation system outlet baffle 14, and an outlet of the dust remover 15 is respectively connected to an original desulfurization system and a concentration tower system through a boiler induced draft fan 1.
The utility model discloses the concentrated tower system is parallel with former boiler draught fan, on the flue behind boiler draught fan 1, makes a tee bend, draws forth a part flue gas and gets into concentrated tower draught fan 3, then gets into concentrated tower 4. A part of waste water is evaporated by utilizing the heat of hot flue gas, the flow of the concentrated waste water is reduced, and then evaporation is carried out, wherein the concentration multiplying power is generally 1-3 times. The wastewater enters a rotary atomization evaporation system through a concentrated wastewater delivery pump 9 after being concentrated.
The utility model discloses rotatory atomizing vaporization system is parallel with facilities such as the air preheater of former boiler afterbody, from former deNOx systems export preparation flue tee bend, draws forth some flue gas and gets into evaporating tower 13. The concentrated wastewater is also conveyed to the evaporation tower 13, and then the heat of the hot flue gas after denitration is fully utilized to carry out evaporation treatment on the concentrated wastewater. The core equipment is an evaporation tower 13, the evaporation tower 13 introduces flue gas by using a rotational flow principle, a high-speed rotary atomizer 12 is configured to atomize and disperse concentrated wastewater into the evaporation tower 13, water is evaporated, and crystals of salt enter a dust remover 15 along with the flue gas.
Claims (1)
1. The utility model provides a concentrated evaporation plant for power plant's waste water zero release, a serial communication port, it includes concentration tower system and rotatory atomizing vaporization system, concentration tower system contains concentration tower (4), flue inlet top has been put and has been sprayed layer (5) and defroster (6) in concentration tower (4), the flue gas that rotatory atomizing vaporization system dust remover (15) came partly gets into the flue inlet on concentration tower (4) lateral wall through concentration system entry baffle (2) and concentration system draught fan (3) in proper order behind boiler draught fan (1), the bottom is power plant's waste water in concentration tower (4), the pipeline is drawn forth to concentration tower (4) bottom and is connected to spraying layer (5) through concentration circulating pump (8), the export flue gas on concentration tower (4) top is mixed with another part flue gas that comes from boiler draught fan (1) after concentration system exit baffle (7) and is sent to former desulfurization system, concentrated wastewater led out from the bottom of the concentration tower (4) is conveyed to a rotary atomization evaporation system through a concentrated wastewater conveying pump (9); rotatory atomizing evaporation system includes evaporating tower (13), concentrated waste water that comes from the concentrating tower system gets into in evaporating tower (13) through atomizer (12) at evaporating tower (13) top, partly evaporation tower (13) top is sent into through evaporating system entry baffle (11) to the flue gas that deNOx systems came, dust remover (15) are sent to through boiler afterbody flue (16) to another part of flue gas, evaporating tower (13) bottom is got into dust remover (15) through evaporating system exit baffle (14) by atomizing waste water, dust remover (15) export is connected to former desulfurization system and concentrating tower system respectively through boiler draught fan (1).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920976766.1U CN210367050U (en) | 2019-06-27 | 2019-06-27 | Concentration and evaporation device for zero discharge of power plant wastewater |
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| CN201920976766.1U CN210367050U (en) | 2019-06-27 | 2019-06-27 | Concentration and evaporation device for zero discharge of power plant wastewater |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142146A (en) * | 2019-06-27 | 2020-12-29 | 同方环境股份有限公司 | Concentration and evaporation system for zero discharge of power plant wastewater |
| CN112429901A (en) * | 2020-11-18 | 2021-03-02 | 成都市蜀科科技有限责任公司 | Desulfurization waste water zero discharge system of low temperature flue gas concentration decrement and evaporation of double fluid bypass flue |
-
2019
- 2019-06-27 CN CN201920976766.1U patent/CN210367050U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112142146A (en) * | 2019-06-27 | 2020-12-29 | 同方环境股份有限公司 | Concentration and evaporation system for zero discharge of power plant wastewater |
| CN112429901A (en) * | 2020-11-18 | 2021-03-02 | 成都市蜀科科技有限责任公司 | Desulfurization waste water zero discharge system of low temperature flue gas concentration decrement and evaporation of double fluid bypass flue |
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